Iron and sulphur powders mixed
Numéro d’image : 11520155
| Mixed iron and sulphur powders. Image 2 of 3. Iron (black) is a dense magnetic metal while sulphur (yellow) is a less dense,non-magnetic non-metal. These elements can be used to demonstrate the difference between a physical and a chemical change. Mixing the two powders,as here,is a purely physical change: the elements retain their properties and can be easily separated. A magnet could be used to pull away the iron,for instance. If the elements are heated together,however,a chemical change occurs and they react to form iron sulphide (see A500/595). This compound's properties are unlike those of its consituent elements. See A500/593 for the separate powders | |
| Licence : | Droits gérés |
| Crédit: | Science Photo Library / Chillmaid, Martyn F. |
| Taille de l’image : | 4256 px × 2848 px |
| Model Release : | Non requis |
| Property Release : | Non requis |
| Restrictions : | - |
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